Iowa Dams
4,124 dams tracked by the National Inventory of Dams
Total Dams
4,124
High Hazard
91
2.2%
Poor / Unsatisfactory
25
Average Age
46 yrs
Hazard Classification
High91 (2.2%)
Significant274 (6.6%)
Low3,759 (91.1%)
Condition Assessment
Satisfactory259 (6.3%)
Fair81 (2.0%)
Poor / Unsatisfactory25 (0.6%)
Not Rated3,759 (91.1%)
Federal
25
State
141
Local
1,938
Private
2,014
Tallest Dams
- Coralville Dam132 ft
- Saylorville Dam125 ft
- County Basin Dam104 ft
- Rathbun Dam100 ft
- Brushy Creek Dam100 ft
High Hazard Dams
- Coralville DamHigh
- Saylorville DamHigh
- Rathbun DamHigh
- Brushy Creek DamHigh
- Big Creek Barrier DamHigh
Poor Condition Dams
All Dams in Iowa
Showing 2326–2350 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Kauffman Dam Washington County | 25 | 1986 | Low | Not Rated |
| Kasperbauer Dam Crawford County | 29 | 1976 | Low | Not Rated |
| Kasparbauer Harrison County | 49 | 2012 | Low | Not Rated |
| Kamerick Road Structure Monroe County | 30 | 2001 | Low | Not Rated |
| Kaiser Dam Monroe County | 32 | 1988 | Low | Not Rated |
| Justice Dam Clarke County | 31 | 1995 | Low | Not Rated |
| Jurinek Dam Washington County | 32 | 2001 | Low | Not Rated |
| Jungman Dam Dallas County | 34 | 1987 | Low | Not Rated |
| Jungman Dam Dallas County | 29 | 1968 | Low | Not Rated |
| Jungman Dam Dallas County | 29 | 1990 | Low | Not Rated |
| Juengling/Prehm Dam Henry County | 26 | 1961 | Low | Not Rated |
| Judge Dam Monroe County | 32 | 1994 | Low | Not Rated |
| Judge Dam Tama County | 38 | 1955 | Low | Not Rated |
| Jsc Farms Dam 1 Dallas County | 25 | 1994 | Low | Not Rated |
| J.S.C. Farms Dam Dallas County | 32 | 1989 | Low | Not Rated |
| Jsc Farms Dam Dallas County | 49 | 1995 | Significant | Satisfactory |
| Joshua Rardin Dam Adair County | 22 | 2017 | Low | Not Rated |
| Jorgenson Dam Guthrie County | 34 | 1975 | Low | Not Rated |
| Jorgensen Dam Guthrie County | 34 | 1971 | Low | Not Rated |
| Jorgensen Dam Madison County | 36 | 1990 | Low | Not Rated |
| Jorgensen Dam Audubon County | 29 | 1962 | Low | Not Rated |
| Jorgensen Dam Guthrie County | 31 | 1960 | Low | Not Rated |
| Jordan Creek Mall - South Dam Dallas County | 17 | 2006 | Significant | Satisfactory |
| Jordan Creek Mall - Northwest Dam Dallas County | 17 | 2006 | Significant | Satisfactory |
| Jones Dam Taylor County | 25 | 2002 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.